Corrections to complete the port to MingW

luprex/cpp/drv/driver-linux.cpp

@@ -11,6 +11,7 @@
 #include <map>
 #include <vector>
 #include <string>
+#include <filesystem>
 
 #include <poll.h>
 #include <sys/time.h>

luprex/cpp/drv/driver-mingw.cpp

@@ -3,18 +3,22 @@
 
 #include "drvutil.hpp"
 #include "sslutil.hpp"
-#include "../cpp/enginewrapper.hpp"
+#include "../core/enginewrapper.hpp"
 
 #include <iostream>
 #include <cstdio>
 #include <cstring>
 #include <cassert>
+#include <map>
+#include <vector>
+#include <string>
 #include <filesystem>
 
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #include <synchapi.h>
 #include <sysinfoapi.h>
+#include <libloaderapi.h>
 #include <windows.h>
 #include <openssl/ssl.h>
 #include <openssl/rsa.h>
@@ -194,7 +198,7 @@ static int socket_poll(struct pollfd *pollvec, int pollcount, int mstimeout, std
     }
     int status = WSAPoll(pollvec, pollcount, mstimeout);
     if (status < 0) {
-        err = strerror_str(WSAGetLastError());
+        err = drvutil::strerror_str(WSAGetLastError());
         return -1;
     }
     return status;
@@ -266,13 +270,28 @@ static void ssl_load_certificate_authorities(SSL_CTX *ctx) {
     CertCloseStore(hStore, 0);
 }
 
+// Load the DLL if it's not already loaded. Stores
+// the handle in a global variable.
+static void load_engine_dll() {
+    // Not actually implemented yet.  Currently, the engine
+    // is linked right into the executable.
+}
+
+static void call_init_engine_wrapper(EngineWrapper *w) {
+    load_engine_dll();
+    using InitFn = void (*)(EngineWrapper *);
+    InitFn initfn = (InitFn)GetProcAddress(GetModuleHandle(NULL), "init_engine_wrapper");
+    assert(initfn != nullptr);
+    initfn(w);
+}
+
 #include "driver-common.cpp"
 
 int main(int argc, char **argv)
 {
     init_winsock();
-    OPENSSL_init_ssl(0, NULL);
+    assert(OPENSSL_init_ssl(0, NULL) == 1);
-    SourceDB::register_lua_builtins();
+    sslutil::clear_all_errors();
     Driver driver;
     return driver.drive(argc, argv);
 }